Pinhole Size Calculator

Rayleigh formula — λ = 550 nm

Distance between pinhole and film plane.

Enter focal length to calculate

Pinhole Exposure Calculator

Convert metered exposure to pinhole exposure, with reciprocity.

Metered Exposure

Time

ISO

Aperture (f/)

Pinhole Camera Parameters

ISO

Aperture (f/)

Reciprocity Factor

Exponent

Enter values above to calculate